Aiming at the problem that the control system of permanent magnet synchronous motor(PMSM)was prone to decline in control performance due to uncertainties such as external disturbances,a composite control algorithm based on improved adaptive nonsingular terminal sliding mode controller and sliding mode disturbance observer compensation technology was proposed.A new adaptive exponential approach law was selected to design a non-singular terminal sliding mode speed loop controller.The new approach law can reduce chattering while ensuring fast convergence of the control system and dynamically adapting to changes in the controlled system;using an extended sliding mode disturbance,the real time estimation of uncertain parameters in the system observer and the feedforward compensation of the controller were performed,and its stability was demonstrated through Lyapunov functions.Simulation and test results show that compared with PI control and traditional sliding mode control,the proposed method can effectively improve the chattering problem,update the control accuracy of the control system to the motor,and raise the robustness and anti-interference performance of the system.
维普
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